Transverse momentum dependence of D-meson production in Pb-Pb collisions at √sNN=2.76 TeV

Adam, J. and Antičić, Tome and Erhardt, Filip and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Utrobičić, Antonija and Zyzak, M. (ALICE Collaboration) (2016) Transverse momentum dependence of D-meson production in Pb-Pb collisions at √sNN=2.76 TeV. Journal of High Energy Physics, 2016 (3). pp. 81-43. ISSN 1029-8479

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Abstract

The production of prompt charmed mesons D0 , D+ and D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the centre-of-mass energy per nucleon pair, √sNN, of 2.76 TeV. The production yields for rapidity |y| < 0.5 are presented as a function of transverse momentum, pT, in the interval 1–36 GeV/c for the centrality class 0–10% and in the interval 1–16 GeV/c for the centrality class 30–50%. The nuclear modification factor RAA was computed using a proton-proton reference at √s = 2.76 TeV, based on measurements at √s = 7 TeV and on theoretical calculations. A maximum suppression by a factor of 5–6 with respect to binary-scaled pp yields is observed for the most central collisions at pT of about 10 GeV/c. A suppression by a factor of about 2–3 persists at the highest pT covered by the measurements. At low pT (1–3 GeV/c), the RAA has large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all pT intervals, the RAA is larger in the 30–50% centrality class compared to central collisions. The D-meson RAA is also compared with that of charged pions and, at large pT, charged hadrons, and with model calculations.

Item Type: Article
Keywords: heavy ion experiments, quark gluon plasma, charm physics
Date: March 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: Open Access. © Copyright CERN, for the benefit of the ALICE Collaboration. Article funded by SCOAP3. Received: October 5, 2015. Revised: December 18, 2015. Accepted: February 3, 2016. Published: March 14, 2016.
Divisions: Faculty of Science > Department of Physics
Publisher: Springer
Depositing User: Nikola Poljak
Date Deposited: 27 May 2016 10:13
Last Modified: 27 May 2016 10:19
URI: http://digre.pmf.unizg.hr/id/eprint/4856

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